2025 week #26: SL SUG meeting

The following notes were taken from the Tuesday, June 24th, 2025 Simulator User Group (SUG) meeting. They form a summary of the items discussed, and are not intended to be a full transcript. The notes were taken from my chat log of the meeting. No video this week.

Meeting Overview

• The Simulator User Group (also referred to by its older name of Server User Group) exists to provide an opportunity for discussion about simulator technology, bugs, and feature ideas.
• These meetings are conducted (as a rule):
  • Every Tuesday at 12:00 noon SLT.
  • In text (no Voice).
  • At this location.
• Meetings are open to anyone with a concern / interest in the above topics, and form one of a series of regular / semi-regular User Group meetings conducted by Linden Lab.
• Dates and times of all current meetings can be found on the Second Life Public Calendar, and descriptions of meetings are defined on the SL wiki.

Simulator Deployments

• There are no planned deployments to any channels this week, only restarts (RC channels subject to confirmation at the time of the meeting).
• The back-end work which had stalled simulator updates over the last few weeks is now coming to an end.

SL Viewer Updates

• Default viewer 7.1.15.15596336374 promoted June 12 – No Change.
• Second Life Project glTF Mesh Import, version 7.1.14.15361077240 June 2 – No Change.
• Second Life Project Lua Editor Alpha (Aditi only), version 7.1.12.14888088240, May 13 –  No Change.

In Brief

• The subject of holding the meeting every other week was raised again, somewhat supported by those who have only been attending since the simulator release cycle had been put on hold. The majority still favoured a weekly meeting, with the chair possibly rotated between those Lindens who regularly attend.
• Leviathan Linden:
  • His work to try to fix the “sometimes not all content shows up at login” problem is awaiting review. If it passes, it could be in the next simulator update (Fig Newton / Fig Pudding – whichever name is now en vogue).
  • Has an idea as to what might be causing missing content on sim crossing and inter-sim TPs, but needs time to dig into it and try to come up with a solution.
  • Also hopes to finish working on a slight speed-up of the code that generates full object updates so that SLua scripts don’t seem slow when processing such updates.
  • Further noted that reports that the new version of Firestorm causing the server to suffer low FPS (45 → 35) for 1 – 4 seconds, every 60 or 90 seconds when driving a vehicle might also be related to object update issues, although he has yet to carry out a detailed investigation to determine a) if it is real; b) what might be causing it.
• Monty Linden:
  • Has been tracking down the cause of the issue of corrupted Linden grass on and simulator restart (see this report as a reference).
  • Is doing some maintenance work on the Key Value Pair (KVP) store (associated with Second Life Experiences), but noted there are currently no plans for more in-depth work on the KVP store at present, although some plans are being considered.
  • Responding to
  • Allow llHTTPRequest to request application/x-ndjson, noted it would have to be reviewed and that LL’s  http library insists on interpreting response bodies even though it shouldn’t (e.g. can’t do ‘Range’ if a fragment of json or other structured language is to be returned).
• A request was made for a native HTTP library for SLua, with Leviathan Linden noted there would probably be no special path for SLua http; rather, the plan is for any custom script callback operations to be uniform across the various script engines.
• A further discussion on issues of people being being able to select non-owned vehicles / having a scripted ability to report when someone else touches a person’s vehicle / attempt to interfere with vehicles.
• A further discussion on SLua capabilities, with a comment from Leviathan Linden that Rider Linden (on vacation) and Harold Linden (not available for the meeting) would likely be better placed to answer in detail.

† The header images included in these summaries are not intended to represent anything discussed at the meetings; they are simply here to avoid a repeated image of a rooftop of people every week. They are taken from my list of region visits, with a link to the post for those interested.